cpudetect: add av_force_cpu_flags()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/avutil.h

@@ -40,7 +40,7 @@
 #define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
 
 #define LIBAVUTIL_VERSION_MAJOR 51
-#define LIBAVUTIL_VERSION_MINOR  3
+#define LIBAVUTIL_VERSION_MINOR  4
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \

libavutil/cpu.c

@@ -19,10 +19,15 @@
 #include "cpu.h"
 #include "config.h"
 
+static int flags, checked;
+
+void av_force_cpu_flags(int arg){
+    flags   = arg;
+    checked = 1;
+}
+
 int av_get_cpu_flags(void)
 {
-    static int flags, checked;
-
     if (checked)
         return flags;
 

libavutil/cpu.h

@@ -46,6 +46,13 @@
  */
 int av_get_cpu_flags(void);
 
+
+/**
+ * Disables cpu detection and forces the specified flags.
+ */
+void av_force_cpu_flags(int flags);
+
+
 /* The following CPU-specific functions shall not be called directly. */
 int ff_get_cpu_flags_arm(void);
 int ff_get_cpu_flags_ppc(void);